Boiler-tube connection



- W. F. TRIP-LEN. BOILER TUBE CONNECTION. APPLICATION FILED SEPT. a. ma

WI/ZIwSSG/S auozm #4 Patented May 20, 1919.

' WILLIAM F. TRIPLETT, or GRAND JUNCTION, COLORADO.

BOILER-TUBE CONNECTION.

Specification of Letters iatent.

Patented May 20, 1919.

Application filed September 6, 1918. Serial No. 252,891.

To all whom it may concern:

Be it known that I, \VILLIAM F. TRIP- LETT, a citizen of the UnitedStates, residing at Grand. Junction, in the county of have invented Mesaand State of Colorado,

new and useful Improvements in Boiler- Tube Connections, of

is a specification.

This invention relates to boiler construction, particularly to means forsecuring the boiler tube to the flue sheet, and has for its which thefollowing object the provision of a novel connection between the boilertube and the flue sheet whereby an extremely tight joint will be provided so that leakage will be prevented, the construction being suchthat the end of the tube will be effectively braced so that an extremelystrong structure will be produfied ing out of the copper gasket will beprevented.

More specifically the object of the invention resides in the provisionof inwardly extendin flanges formed on the flue sheet around t e tubeopenings, the tubes extending entirely through the openings and beingprovided upon their outer ends with thimbles threaded thereon andbearing against copper gaskets, the thimbles bein provided withreinforcing flanges seated within countersinks at the outer ends of thetube receiving openings whereby the outer face of the flue sheet will beflush.

A further object is the provision of a connection of this characterwhich will be extremely economical in the use of material, simple andinexpensive in construction, efficient in use, durable in service and ageneral improvement in the art.

"With the above and other objects and advantages in view, the inventionconsists in the details of construction to be hereinafter more fullydescribed and claimed, and illustrated in the accompanying drawing inwhich Figure 1 1s a sectional view through a portion of a flue sheet andtube showing my novel connection.

Fig. 2 is an elevation of the thimble detached and v Fig. 3 is a planview of a tube and flue sheet.

Referring more particularly to the drawing the numeral 5 designates aportion of the flue sheet of a boiler having a circular open- -beprevented from buckling.

ing surrounded by an inwardly extending flange 6. The inner portion ofthe opening is cylindrical as shown at 7 the intermediate ,thefrusto-conical portion 8 of the opening. The thimble 13 is provided withan annular flange 15 seating within the countersink 9 for forming aflush .joint. The outer face of the flange 15 is provided with aplurality of slots 16 for engagement of a spanner wrench whereby thethimble may be threaded into position firmly engaging the gasket 12.

The purpose-of the flanged flue shet'is primarily to provide for a tightflue or tube joint. It also acts as abrace or stay for long boiler tubesor flues, thereby eliminating the vibration on the direct end of thetube. It also does away with the idea of brick arches, a constructionwhich is used to protect flues where they copper. With the use of theabove described joint, necessity for rolling of calking thetubes orflues will be eliminated. The pur pose of cou'ntersinking the flue sheetas shown at 9, is to permit the flange of the thimble to lie flush withthe flue sheet. This construction also reinforces the flue sheet andhelps to prevent the same from honey-combing. In this form ofconstruction'it will also be possible to use a much harder metal inthe'making of the tube for the reason that the end of the tube extendsentirely through the flue sheet. The provision of the inwardly extendingflange 6 are beaded in with around the tube receivlng opening provides areinforcement whereby the flue sheet will Furthermore, in view of thefact that water within the boiler may circulate around the flange 6 thedanger of burning out of the copper gasket 12 will be minimized and thewater pressure around the tube will be equalized instead of having adirect pressure against the end of the tube as in ordinary construction.

'VVhile I have shown and described the preferred embodiment of theinvention, it Will of coursebe readily understood that I reserve theright to make such changes in the form, construction and arrangement ofparts as will not depart from the spirit of the invention nor the scopeof the subjoined claim.

Having thus described my invention I claim:

A boiler tube connection comprising in combination a flue sheet providedWith an opening surrounded by an inwardly extending integral flange, theinner portion of said opening being cylindrical and threaded, theintermediate portion of said opening being frusto-conical and of greaterdiameter than said cylindrical portion, the outer portion of saidopening being countersunk, a boiler tube having its end threaded throughsaid cylindrical portion and having its extremity extending to the outersurface of said flue sheet, a gasket of relatively soft materialsurrounding the threaded end of said tube and disposed Within thesmaller end of said frusto-conic'al portion of the opening, aninternally, threaded thimble engaged upon the threaded end of thetubeand having a frusto-conical outer' periphery conformingly engagingwithin said frusto-conicalportion of the opening, and an outwardlyextending annular flange on said thimble seating within the countersunkportion of said opening. 7

In testimony whereof I aflix my signature.

' WILLIAM F; TRIPLETT.

